linux-kernel - Re: [PATCH] rust: kbuild: support `-Cjump-tables=n` for Rust 1.93.0

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Message-ID: <CANiq72kWcptN+hu+gMwN2n8WkXrOku4kCHkSRsMzJmQeiCAJOQ@mail.gmail.com>
Date: Tue, 4 Nov 2025 20:25:15 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: Alex Gaynor <alex.gaynor@...il.com>, Nathan Chancellor <nathan@...nel.org>, 
	Nicolas Schier <nicolas@...sle.eu>, Huacai Chen <chenhuacai@...nel.org>, 
	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, rust-for-linux@...r.kernel.org, 
	linux-kbuild@...r.kernel.org, WANG Xuerui <kernel@...0n.name>, loongarch@...ts.linux.dev, 
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org, patches@...ts.linux.dev
Subject: Re: [PATCH] rust: kbuild: support `-Cjump-tables=n` for Rust 1.93.0

On Sat, Nov 1, 2025 at 10:40 AM Miguel Ojeda <ojeda@...nel.org> wrote:
>
> Rust 1.93.0 (expected 2026-01-22) is stabilizing `-Zno-jump-tables`
> [1][2] as `-Cjump-tables=n` [3].
>
> Without this change, one would eventually see:
>
>       RUSTC L rust/core.o
>     error: unknown unstable option: `no-jump-tables`
>
> Thus support the upcoming version.
>
> Link: https://github.com/rust-lang/rust/issues/116592 [1]
> Link: https://github.com/rust-lang/rust/pull/105812 [2]
> Link: https://github.com/rust-lang/rust/pull/145974 [3]
> Signed-off-by: Miguel Ojeda <ojeda@...nel.org>

It got stabilized and merged upstream.

Applied to `rust-fixes` -- thanks everyone!

Cheers,
Miguel